* All times are local time for Cardiff. Time is adjusted for DST when applicable. Dates are based on the Gregorian calendar.

June Solstice (Summer Solstice) is on Sunday, June 21, 2015 at 5:39 PM in Cardiff. This day is 8 hours, 48 minutes longer than on December Solstice. In most locations north of Equator, the longest day of the year is around this date.